Comprehension Passage
Pollen grains, which vary in size, shape, color, and design across species, are generally spherical. They have a distinctive two-layered wall. Pollen grains consist of two cells. Pollen formation begins with microsporogenesis. Pollen can trigger severe allergic reactions, such as asthma.
Label the A, B, C and D :
1
A-Synergid, B-Polar nuclei, C-Egg cell and D-Antipodal
2
A-Antipodal, B- Polar nuclei, C-Egg cell and D-Synergid
3
A-Egg cell, B-Polar nuclei, C-Antipodal and D-Synergid
4
A-Polar nuclei, B-Antipodal, C-Egg cell and D-Synergid